Hi Ray Depends on which rolls battery L-16’s
The EX version is 3400 cycles to 50%, and 2100 cycles to 80% the more standard version is around 1800 cycles to 50% and 1000 cycles to 80%. And the Ah specs listed on the rolls site uses the 20 hr rate. Jay Peltz power. > On Jun 11, 2020, at 8:14 AM, Ray <r...@solarray.com> wrote: > > > As far as 2v L16s go, I've not seen good things with the Trojan L16 2 v > cells. The Rolls version looks like it is one cell though, not 3 cells > paralleled internally like the infamous Trojan. The voltages sound a bit > low, can they give you SG readings? How come they haven't put those on a > maintenance charge at the warehouse? I've dealt with batteries that have > sat uncharged for quite a while, and not had any issues, but definitely > didn't get outstanding life either. I'd pass the discount to the customer > and let them decide. I'd also offer another battery choice too. The HUP for > instance is going to have a better price per cycle in the long run, since it > has 2100 cycles to 80% DOD vs 1200 for the Rolls. With the sitting, I'd > figure more like 1000 cycles actual maybe. So the cost of the Rolls would > need to be less than half what an equivalent HUP is. > > Also beware, many customers get fooled by Rolls' amp hour specs. They list > 100 hr discharge rates, so the Rolls can look amazing on paper. However, the > customer really needs to be designing and comparing at the 20 hr rate. I've > made that same mistake, and was quite disappointed. > > Ray Walters > Remote Solar > 303 505-8760 > On 6/11/20 2:05 AM, Sindelar Solar wrote: >> Wrenches, >> >> Here's one I haven't encountered before, and I'm interested in the range of >> opinions I may receive. >> >> My battery supplier screwed up, and they admit it. On April 27 I ordered a >> 24V set of 2V Surrette L16 FLAs for a long time client; note that these were >> the client's choice after his extensive research. The lead time was >> estimated at 10-12 weeks. Today I got the news that the distribution center >> in Reno had not placed the order, as collective orders for Rolls batteries >> were so slow during Covid that they hadn't wanted to ship just one set. >> >> I was told that they had a set in the Reno warehouse that they could bring >> to Albuquerque that had a manufacture date of 6/26/2019. I was told that at >> rest the 12 cells showed an average resting voltage of 2.14 vpc, with the >> highest at 2.18V and the lowest at 2.08V. >> >> I was offered them at a discount of ~18% off of my dealer cost. >> >> Should I have any hesitation about accepting and installing a set that has >> sat at rest for nearly a year? The alternative is to start over with the >> 10-12 week lead time, unless we can arrange a rush delivery. >> >> Opinions welcome here, please. >> >> Allan >> >> -- >> Allan Sindelar >> al...@sindelarsolar.com >> NABCEP Certified PV Installation Professional (charter certificant) >> #102503-52 >> New Mexico EE98J Journeyman Electrician >> Founder (Retired), Positive Energy, Inc. >> 505 780-2738 cell >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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